U are right the F.E.A.R series games (F.E.A.R,EXTRACTION POINT,PERSEUS MANDATE,PROJECT ORIGIN & REBORN) will not let u sleep,Also Call Of Duty modern Warfare 2 & 4,BATTLEFIELD BAD COMPANY 2 are also WORTH keeping U awake till sun rises.
Right now the Games like SINGULARITY (somehow like F.E.A.R),SNIPER GHOST WARRIOR & BLUR are some really interesting GAME of 2010.
Waiting ahead for CALL OF DUTY-BLACK OPS,MEDAL OF HONOR,F.E.A.R 3,NFS HOT PURSUIT,HOMEFRONT & BATTLEFIELD BAD COMPANY EXPANSION PACK IN Q4 2010.